CN102675065B - Method for producing dehydrated sodium formaldehyde sulfoxylate powder - Google Patents
Method for producing dehydrated sodium formaldehyde sulfoxylate powder Download PDFInfo
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- CN102675065B CN102675065B CN201210161253.8A CN201210161253A CN102675065B CN 102675065 B CN102675065 B CN 102675065B CN 201210161253 A CN201210161253 A CN 201210161253A CN 102675065 B CN102675065 B CN 102675065B
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- sodium bisulphite
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Abstract
The invention discloses a method for producing dehydrated sodium formaldehyde sulfoxylate powder. The dehydrated sodium formaldehyde sulfoxylate powder is obtained by dehydrating sodium formaldehyde sulfoxylate dihydrate powder in vacuum, wherein high vacuum degree is adopted during dehydrating, the vacuum degree is less than or equal to -0.098MPa, and a stabilizer in an amount which is not more than 15 percent of the mass of the sodium formaldehyde sulfoxylate dihydrate powder is added into the prepared dehydrated sodium formaldehyde sulfoxylate powder. The method for producing the dehydrated sodium formaldehyde sulfoxylate powder has the advantages of eliminating the influence of dehydration of crystal water of the conventional dihydrate product, improving the storage stability of the product and meeting the reducer mixing and dyeing technology of the printing and dyeing industry.
Description
Technical field
The present invention relates to a kind of production method of the sodium bisulphite formaldehyde powder that dewaters.
Background technology
Sodium bisulphite formaldehyde, is commonly called as rongalite, chemical formula NaHSO
2cH
2o2H
2o, is a kind of important chemical feedstocks, and its product appearance form and form are multiple, have bulk, powdery, crystalloid and liquid.The production method of powdery sodium bisulphite formaldehyde has two kinds at present: a kind of is that the melting state sodium bisulphite formaldehyde that evaporation is obtained is put into aluminium dish with after the cooling caking of cold wind, first be crushed to 3-5 centimetre of big or small bulk, then further pulverize, sieve and obtain comminuted powder; Another kind is that directly to take melting state sodium bisulphite formaldehyde be raw material, adopts specific alcohols dispersion agent and kneading machine to carry out cooling, crystallization and produces and obtain crystal powder.While producing crystal powder, the particle of formation is spherical, smooth surface, and its good stability, the shelf-time is longer.Comminuted powder is because being Mechanical Crushing, and out-of-shape, surface irregularity, size are uneven, and specific surface area is large, easy ingress of air and moisture absorption is decomposed, and the shelf-time is relatively short.
But in the powder-like product that the production method of above-mentioned two kinds of powdery sodium bisulphite formaldehydes is produced, all contain bimolecular crystal water, under powder state, after being heated, very easily dehydration impels product to decompose.Meanwhile, in printing and dyeing industry dyeing, powdery sodium bisulphite formaldehyde under certain conditions, can mix with vat powder use.Yet, after mixing with vat powder, due to the subacidity of sodium formate method vat powder, can cause the trace of powdery sodium bisulphite formaldehyde decompose and produce dehydration phenomenon, cause batch mixing accelerate decomposition smelly, and can not meet the batch mixing dyeing with vat powder.
Summary of the invention
Goal of the invention: for the problems referred to above, the object of this invention is to provide a kind of product without crystal water, be easy to preserve, can meet the production method of the dehydration sodium bisulphite formaldehyde powder of printing and dyeing industry batch mixing dyeing.
Technical scheme: a kind of production method of the sodium bisulphite formaldehyde powder that dewaters, with two hydration sodium bisulphite formaldehyde powders after vacuum hydro-extraction and get final product.
During two hydration sodium bisulphite formaldehyde powder dehydrations, adopt condition of high vacuum degree, vacuum tightness≤-0.098MPa.
In the dehydration sodium bisulphite formaldehyde powder making, add stablizer, described stablizer is soda ash, and its add-on is not higher than 15% of described two hydration sodium bisulphite formaldehyde powder quality.
The production method of above-mentioned a kind of sodium bisulphite formaldehyde powder that dewaters, the method comprises the following steps:
(1) two hydration sodium bisulphite formaldehyde powders are added in vacuum drier, vacuum hydro-extraction is carried out in heating, controls vacuum tightness≤-0.098MPa, vacuum-drying temperature≤65 ℃, vacuum-drying time≤2 hour;
(2) when terminal is arrived in vacuum-drying, temperature of charge is down to below 40 ℃, then in vacuum drier, adds stablizer fully to mix, after sieving, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product.
Described two hydration sodium bisulphite formaldehyde powders are crystal powder or comminuted powder.
During described vacuum drier vacuum hydro-extraction, adopt rotary-vane vaccum pump.
The screening plant sieving adopts rotating screen.
Beneficial effect: compared with prior art, advantage of the present invention has been to provide a kind of dehydration sodium bisulphite formaldehyde power production method, eliminated the impact that original two hydrated product crystal water dehydrations impel product to decompose, improve product stock stability, also met the reductive agent batch mixing dyeing of printing dye industry simultaneously.
Embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
Embodiment 1:(1) 100 kilograms of sodium bisulphite formaldehyde crystal powders are added in vacuum drier, then open rotary-vane vaccum pump, drive hot water pump heating material is carried out to vacuum hydro-extraction, control vacuum tightness-below 0.098MPa, 65 ℃ of vacuum-drying temperature, 100 minutes vacuum-drying time;
(2) in vacuum-drying when the terminal, temperature of charge is down to 40 ℃, then the soda ash that is incorporated as sodium bisulphite formaldehyde crystal powder quality 2% in vacuum drier fully mixes, after sieving, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product.
The sodium bisulphite formaldehyde content that dewaters in the finished product is 118.80%.
Embodiment 2:(1) 50 kilograms of sodium bisulphite formaldehyde comminuted powders are added in vacuum drier, then open rotary-vane vaccum pump, drive hot water pump heating material is carried out to vacuum hydro-extraction, control vacuum tightness-below 0.099MPa, 64 ℃ of vacuum-drying temperature, 110 minutes vacuum-drying time;
(2) in vacuum-drying when the terminal, temperature of charge is down to 40 ℃, then the soda ash that is incorporated as sodium bisulphite formaldehyde comminuted powder quality 2% in vacuum drier fully mixes, after sieving, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product.
The sodium bisulphite formaldehyde content that dewaters in the finished product is 116.95%.
Embodiment 3:(1) 100 kilograms of sodium bisulphite formaldehyde crystal powders are added in vacuum drier, then open rotary-vane vaccum pump, drive hot water pump heating material is carried out to vacuum hydro-extraction, control vacuum tightness-below 0.099MPa, 63 ℃ of vacuum-drying temperature, 90 minutes vacuum-drying time;
(2) in vacuum-drying when the terminal, temperature of charge is down to 35 ℃, then the soda ash that is incorporated as sodium bisulphite formaldehyde crystal powder quality 12% in vacuum drier fully mixes, after sieving, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product.
The sodium bisulphite formaldehyde content that dewaters in the finished product is 102.2%.
The dewater determination experiment of sodium bisulphite formaldehyde powder stability of the present invention: get dehydration sodium bisulphite formaldehyde powder by embodiment 1-3 respectively, fully mix at 58.5: 39.0: 2.5 in mass ratio with sodium formate method vat powder, soda ash, with two hydration sodium bisulphite formaldehyde crystal powders, two hydration sodium bisulphite formaldehyde comminuted powder comparisons, place equally at normal temperatures rate of decomposition (in sodium bisulphite formaldehyde) as shown in the table separately 7 days:
| Sample | Rate of decomposition (%) |
| The dehydration sodium bisulphite formaldehyde powder of embodiment 1 | 2.9 |
| The dehydration sodium bisulphite formaldehyde powder of embodiment 2 | 3.1 |
| The dehydration sodium bisulphite formaldehyde powder of embodiment 3 | 1.2 |
| Two hydration sodium bisulphite formaldehyde crystal powders | 87.0 |
| Two hydration sodium bisulphite formaldehyde comminuted powders | 88.1 |
As can be seen here, the dewater stability of sodium bisulphite formaldehyde powder product of the present invention of embodiment 1-3 obviously improves.
Claims (6)
1. the production method of sodium bisulphite formaldehyde powder of dewatering, it is characterized in that: with two hydration sodium bisulphite formaldehyde powders after vacuum hydro-extraction and get final product, in the dehydration sodium bisulphite formaldehyde powder making, add stablizer, described stablizer is soda ash, and the add-on of described stablizer is not higher than 15% of described two hydration sodium bisulphite formaldehyde powder quality.
2. the production method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 1, is characterized in that: during two hydration sodium bisulphite formaldehyde powder dehydrations, adopt condition of high vacuum degree, vacuum tightness≤-0.098MPa.
3. according to the production method of the arbitrary described a kind of sodium bisulphite formaldehyde powder that dewaters of claim 1 to 2, it is characterized in that the method comprises the following steps:
(1) two hydration sodium bisulphite formaldehyde powders are added in vacuum drier, vacuum hydro-extraction is carried out in heating, controls vacuum tightness≤-0.098MPa, vacuum-drying temperature≤65 ℃, vacuum-drying time≤2 hour;
(2) when terminal is arrived in vacuum-drying, temperature of charge is down to below 40 ℃, then in vacuum drier, adds stablizer fully to mix, after sieving, be packaged to be dehydration sodium bisulphite formaldehyde powder-like product.
4. the production method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 1, is characterized in that: described two hydration sodium bisulphite formaldehyde powders are crystal powder or comminuted powder.
5. the production method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 3, is characterized in that: during described vacuum drier vacuum hydro-extraction, adopt rotary-vane vaccum pump.
6. the production method of a kind of sodium bisulphite formaldehyde powder that dewaters according to claim 3, is characterized in that: the screening plant sieving adopts rotating screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161253.8A CN102675065B (en) | 2012-05-23 | 2012-05-23 | Method for producing dehydrated sodium formaldehyde sulfoxylate powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161253.8A CN102675065B (en) | 2012-05-23 | 2012-05-23 | Method for producing dehydrated sodium formaldehyde sulfoxylate powder |
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| Publication Number | Publication Date |
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| CN102675065A CN102675065A (en) | 2012-09-19 |
| CN102675065B true CN102675065B (en) | 2014-03-19 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102924247A (en) * | 2012-10-31 | 2013-02-13 | 江苏省东泰精细化工有限责任公司 | Rongalite solution stabilizing agent and application thereof in liquid rongalite product production |
| CN104478682A (en) * | 2014-12-30 | 2015-04-01 | 江南大学 | Method for improving stability of rongalite solution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557695A (en) * | 2004-02-06 | 2004-12-29 | 吉林市大宇化工有限公司 | Improvement of production method of activating and modifying sodium bisulfoxylate formaldehyde |
| CN101597222A (en) * | 2009-06-15 | 2009-12-09 | 陆焕民 | A kind of rongalite production method |
-
2012
- 2012-05-23 CN CN201210161253.8A patent/CN102675065B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557695A (en) * | 2004-02-06 | 2004-12-29 | 吉林市大宇化工有限公司 | Improvement of production method of activating and modifying sodium bisulfoxylate formaldehyde |
| CN101597222A (en) * | 2009-06-15 | 2009-12-09 | 陆焕民 | A kind of rongalite production method |
Non-Patent Citations (2)
| Title |
|---|
| 一步法合成次硫酸氢钠甲醛的工艺研究及生产实践;田伟军等;《现代化工》;20100331;第30卷(第3期);84-86 * |
| 田伟军等.一步法合成次硫酸氢钠甲醛的工艺研究及生产实践.《现代化工》.2010,第30卷(第3期),84-86. |
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